1. . The fuse is best defined as a:
(A) Current Control device
(B) Current Limiting device
(C) Protection device
(D) None of these
2. . Fuses can serve up to a current of:
(A) 25A
(B) 50A
(C) 75A
(D) 100A
3. . H.R.C. fuses has:
(A) High rating of current
(B) High rupturing capacity
(C) High resistance capacity
(D) None of these
4. . Cartridge type fuse can be used up to a voltage of:
(A) 400 V
(B) 11 kV
(C) 20 kV
(D) 33 KV
5. . Miniature circuit breaker is a small:
(A) Fuse
(B) Magnetic switch
(C) Electromagnetic switch
(D) 2 way switch
6. . Fuses work only:
(A) In daylight
(B) Twice
(C) Once
(D) In moonlight
7. . Using a high current fuse in a low current appliance is very:
(A) Safe
(B) Dangerous
(C) Necessary
(D) Complicated
8. . Circuit breakers work:
(A) Constantly
(B) Only once
(C) When there is resistance
(D) When there is magnetic field
9. . A simple enclosed length of wire that has a low melting point is known as:
(A) Resistor
(B) Fuse
(C) Circuit breaker
(D) Thermistor
10. . A relay is used to:
(A) Break the fault current
(B) Sense the fault
(C) Sense the fault and direct to trip the circuit breaker
(D) All of these
11. . Basic relay connection requirement is that the relay must operate for:
(A) Load
(B) Internal faults
(C) Both a and b
(D) None of these
12. . If electric wires and appliances are overheated due to high voltage of electric current, they can:
(A) Catch fire
(B) Burn
(C) Freeze
(D) Both a and b
13. . Do not use appliances, if:
(A) Damaged
(B) Wires exposed
(C) Working properly
(D) Both a and b
14. . A short thin piece of wire which is heated up and melt by the flowing of electric current in it, is called:
(A) Circuit
(B) Fuse
(C) Cell
(D) Resistor
15. . Electricity flows through any:
(A) Material
(B) Insulator
(C) Conductor
(D) State of matter
16. . If you are the only conductor around, the electricity will flow through:
(A) You
(B) Me
(C) Us
(D) Insulator
17. . A three-point starter is suitable for:
(A) Shunt Motor
(B) Series Motor
(C) Shunt Generator
(D) Compound
18. . The disadvantage of starting an induction motor with a star-delta starter is that:
(A) The starting torque is one-third of the torque in case of delta connection
(B) During starting high losses result
(C) The starting torque increases and the motor runs with jerks
(D) None of these